CVE-2025-5500 is a medium-severity vulnerability affecting version 1.6.3.17499 of the ZhenShi Mibro Fit App on Android. The flaw arises from improper exportation of Android application components declared in the AndroidManifest.xml file, specifically within the component identified as com.xiaoxun.xunoversea.mibrofit. Improper export means that components such as activities, services, broadcast receivers, or content providers are made accessible to other apps or processes without adequate restrictions. This can allow a local attacker—someone with physical or logical access to the device—to interact with these components in unintended ways. The vulnerability does not require user interaction or elevated privileges beyond local access, making it easier to exploit once local access is obtained. The CVSS 4.0 vector indicates low attack complexity and privileges required, no user interaction, and low impact on confidentiality, integrity, and availability, resulting in an overall medium severity score of 4.8. The vendor was notified but did not respond, and no patches or mitigations have been published yet. While no known exploits are currently in the wild, the exploit code has been published, increasing the risk of exploitation. Improperly exported components can lead to unauthorized data access, privilege escalation, or manipulation of app behavior, potentially exposing sensitive user data or enabling further attacks on the device or network. Given the app’s role in fitness and health monitoring, sensitive personal data could be at risk if exploited.

For European organizations, especially those involved in health, fitness, or IoT device management, this vulnerability poses a risk to the confidentiality and integrity of user data collected by the Mibro Fit App. If employees or customers use the vulnerable app on corporate or personal devices connected to organizational networks, attackers with local access could leverage this flaw to access or manipulate sensitive health data or gain a foothold for lateral movement. This could lead to privacy violations under GDPR, reputational damage, and potential regulatory penalties. The impact is heightened in sectors handling sensitive personal data such as healthcare providers, insurance companies, and wellness service providers. Additionally, organizations that distribute or support the Mibro Fit App as part of their service offerings may face increased liability and operational risks. However, the requirement for local access limits remote exploitation, somewhat reducing the overall threat level to organizations unless devices are physically compromised or infected with malware that can exploit this vulnerability locally.

To mitigate this vulnerability, organizations and users should: 1) Monitor for updates from ZhenShi and apply patches promptly once available. 2) Restrict physical and logical access to devices running the Mibro Fit App to trusted users only. 3) Employ mobile device management (MDM) solutions to enforce app usage policies and restrict installation of untrusted apps that could exploit this vulnerability. 4) Use Android security features such as app permission controls and component export restrictions to limit exposure. 5) Conduct regular security audits of installed apps to identify and remediate improperly exported components. 6) Educate users about the risks of local device compromise and encourage strong device authentication mechanisms. 7) Consider isolating devices running the vulnerable app from sensitive networks or data where feasible. These steps go beyond generic advice by focusing on controlling local access, monitoring app behavior, and enforcing organizational policies to reduce exploitation risk in the absence of an official patch.